We can authenticate an ubuntu machine to the Windows Active Directory service using a tool known as likewise-open. The same can be downloaded as below :
Install the package :
dpkg -i likewise-open_22.214.171.1246-0ubuntu10_amd64.deb
Join to the domain as below :
domainjoin-cli join domain.com administrator_name
Once it is success, you would be able to login using the AD credentials.
By default, ubuntu wont show you the option to login as ‘other’ users. You can add the below values in /etc/lightdm/lightdm.conf to enable the option.
[SeatDefaults] greeter-show-manual-login=true greeter-hide-users=true
Now login as “domain.com\username” and give the password to login